US5186849AExpiredUtility

Silicone grease composition

64
Assignee: TOSHIBA SILICONE LTDPriority: Nov 30, 1990Filed: Nov 26, 1991Granted: Feb 16, 1993
Est. expiryNov 30, 2010(expired)· nominal 20-yr term from priority
Inventors:Masanori ToyaHideo TakahashiYasuji Matsumoto
C10N 2010/04C10M 2201/0426C10M 113/12C10M 2201/0866C10N 2040/16C10M 2229/0475C10M 2229/045C10M 2229/048C10M 2201/056C10M 113/02C10M 2201/05C10M 2229/0525C10M 2229/0505C10M 169/00C10M 2201/0876C10M 139/06C10M 2201/0856C10M 159/18C10M 2229/0415C10M 2201/087C10M 2229/047C10M 2229/0435C10M 2201/145C10M 2229/0465C10M 2201/0806C10M 2229/0535C10M 2201/10C10M 125/10C10M 2227/082C10M 2229/025C10M 2229/0425C10M 2229/0455C10M 2201/0616C10M 2229/041C10M 2229/0515C10M 113/06C10M 2227/081C10M 2201/1026C10M 2227/083C10N 2040/17C10N 2020/01C10M 107/50C10M 113/16C10M 2201/105C10M 2229/042C10M 113/08C10M 2229/0545C10M 2227/08C10M 2229/0445C10M 2227/09C10M 2229/046C10M 2229/051C10M 2201/102C10M 125/04C10M 2201/0666C10M 2229/0405C10M 2201/0626C10M 125/26C10M 2201/0416C10M 2201/062C10M 2201/041C10M 2201/1013C10M 2201/0656C10M 2229/0485C10M 2201/0606C10M 2201/14C10M 2207/09
64
PatentIndex Score
16
Cited by
8
References
10
Claims

Abstract

A silicone grease composition comprising: (A) 100 parts by weight of a polyorganosiloxane containing at least two silicon-bonded vinyl groups per molecule and having a viscosity at 25 DEG C. of from 10 to 1,000,000 cSt; (B) from 10 to 200 parts by weight of a filler comprising at least one member selected from the group consisting of calcium carbonate, zinc carbonate, a composite zinc white, and silica; and (C) from 0.001 to 0.1 part by weight of platinum or a platinum compound.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
       1. A silicone grease composition comprising: (A) 100 parts by weight of a polyorganosiloxane containing at least two silicon-bonded vinyl groups per molecule and having a viscosity at 25° C. of from 10 to 1,000,000 cSt;   (B) from 10 to 200 parts by weight of a filler comprising at least one member selected from the group consisting of calcium carbonate, zinc carbonate and a composite zinc white; and   (C) from 0.001 to 0.1 part by weight of platinum or a platinum compound.   
     
     
       2. A silicone grease composition as claimed in claim 1, wherein component (A) contains phenyl group in an amount of from 10 to 50 mol% per mole of all the organic groups in component (A). 
     
     
       3. A silicone grease composition as claimed in claim 1, wherein component (A) contains a perfluoroalkyl group in an amount of from 10 to 50 mol% per mole of all the organic groups in component (A). 
     
     
       4. A silicone grease composition as claimed in claim 1, wherein component (A) has a viscosity at 25° C. of from 50,000 to 500,000 cSt. 
     
     
       5. A silicone grease composition as claimed in claim 1, wherein said filler is a composite zinc white. 
     
     
       6. A high-voltage insulated device containing high-voltage junctions covered with electrically insulating silicone rubber caps, wherein an inner face of the cap or a surface of the junction is coated with a silicone grease composition comprising: (A) 100 parts by weight of a polyorganosiloxane containing at least two silicon-bonded vinyl groups per molecule and having a viscosity at 25° C. of from 10 to 1,000,000 cSt;   (B) from 10 to 200 parts by weight of a filler comprising at least one member selected from the group consisting of calcium carbonate, zinc carbonate and a composite zinc white; and   (C) from 0.001 to 0.1 part by weight of platinum or a platinum compound.   
     
     
       7. A high-voltage insulated device as claimed in claim 6, wherein component (A) contains phenyl group in an amount of from 10 to 50 mol% per mole of all the organic groups in component (A). 
     
     
       8. A high-voltage insulated device as claimed in claim 6, wherein component (A) contains a perfluoroalkyl group in an amount of from 10 to 50 mol% per mole of all the organic groups in component (A). 
     
     
       9. A high-voltage insulated device as claimed in claim 6, wherein component (A) has a viscosity at 25° C. of from 50,000 to 500,000 cSt. 
     
     
       10. A high-voltage insulated device as claimed in claim 6, wherein said filler is a composite zinc white.

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